''It's all about going forward from now on.''
Speaking before the worlds, Wanaka-based Porteous admitted he had no idea whether he would be among the favourites for the title, and wouldn't be thinking in those terms.
''I wouldn't really know. The only thing I can control is how I'm going to ski.
''You can't control what other people think, so I don't worry too much about that,'' he said.
Another New Zealand skier Ben Harrington was in third until Ladd came through with a sizzling 92.8 on his final run to grab second and relegate Harrington to fourth behind Ruud.
The women's top qualifier Kelly Sildaru of Estonia won the women's title from Russian Valeriya Demidova and China's Kexin Zhang.